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Class Information
Number: 333/115
Name: Wave transmission lines and networks > Plural channel systems > Having branched circuits > Using directional coupler > Having tem lines
Description: Subject matter wherein the first and second transmission lines are the type having only transverse electromagnetic components and no longitudinal electromagnetic components as their primary mode of operation.










Sub-classes under this class:

Class Number Class Name Patents
333/116 Using stripline 395


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8570115 Power division network device Oct. 29, 2013
8212635 Surface wave coupler Jul. 3, 2012
7873329 Transceiver having mixer/filter within receiving/transmitting cavity Jan. 18, 2011
7777591 Variable power coupling device Aug. 17, 2010
7683734 RF re-entrant combiner Mar. 23, 2010
7535316 Self-supported strip line coupler May. 19, 2009
7477114 3DB coupler Jan. 13, 2009
7443266 Variable power coupling device Oct. 28, 2008
7429903 Dual directional coupler with multi-stepped forward and reverse coupling rods Sep. 30, 2008
7307492 Design, layout and method of manufacture for a circuit that taps a differential signal Dec. 11, 2007
7283020 Signal extracting arrangement Oct. 16, 2007
6963255 Power splitter Nov. 8, 2005
6933801 Distributed load transmission line matching network Aug. 23, 2005
6882243 Directional coupler Apr. 19, 2005
6822532 Suspended-stripline hybrid coupler Nov. 23, 2004
6803838 Wideband 180 microwave phase switch Oct. 12, 2004
6784521 Directional coupler Aug. 31, 2004
6590472 Surface mounted broadside directional coupler Jul. 8, 2003
6549089 Microstrip directional coupler loaded by a pair of inductive stubs Apr. 15, 2003
6472885 Method and apparatus for measuring and characterizing the frequency dependent electrical properties of dielectric materials Oct. 29, 2002
6204827 Antenna feeding circuit Mar. 20, 2001
6150898 Low-pass filter with directional coupler and cellular phone Nov. 21, 2000
6066994 Broadband directional coupler including amplifying, sampling and combining circuits May. 23, 2000
5994977 High frequency signal directional coupling line Nov. 30, 1999
5966057 Reflection reducing directional coupler Oct. 12, 1999
5864259 Measuring line for a coaxial conductor for determining energy throughflow and standing wave ratios Jan. 26, 1999
5774026 High frequency impedance transformer Jun. 30, 1998
5570069 Broadband directional coupler Oct. 29, 1996
5541617 Monolithic quadrifilar helix antenna Jul. 30, 1996
5499001 Cavity matched hybrid coupler Mar. 12, 1996
5347244 Broadband directional coupler using cables Sep. 13, 1994
5329285 Dually polarized monopulse feed using an orthogonal polarization coupler in a multimode waveguide Jul. 12, 1994
5304961 Impedance transforming directional coupler Apr. 19, 1994
5162911 Circuit for adding r.f. signals Nov. 10, 1992
5148132 Microwave coupler Sep. 15, 1992
5111165 Microwave coupler and method of operating same utilizing forward coupling May. 5, 1992
5105171 Coplanar waveguide directional coupler and flip-clip microwave monolithic integrated circuit assembly incorporating the coupler Apr. 14, 1992
4952916 Power transmission Aug. 28, 1990
4928077 Tunable microwave coupler with mechanically adjustable conductors May. 22, 1990
4859971 R-segment transmission line directional coupler Aug. 22, 1989
4849761 Multi-mode feed system for a monopulse antenna Jul. 18, 1989
4814780 Variable directional coupler Mar. 21, 1989
4810982 Coaxial transmission-line matrix including in-plane crossover Mar. 7, 1989
4797643 Coaxial hybrid coupler and crossing element Jan. 10, 1989
4704590 Device for coupling microwave energy Nov. 3, 1987
4700152 Non-contacting signal coupling device Oct. 13, 1987
4675622 Coaxial cable including an induction cable Jun. 23, 1987
4647878 Coaxial shielded directional microwave coupler Mar. 3, 1987
4641111 Microwave coupler Feb. 3, 1987
4578702 CATV tap-off unit with detachable directional coupler Mar. 25, 1986

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